Recently, I noticed that whenever I open a sent mail, the subject line is changing to a number followed by Chinese characters. I try to change the line back to the original subject, but when I close the e-mail, it reverts back to the Chinese characters. This began a week or so ago.
Do I have a virus or malware bug in my Outlook program? Any way of running a diagnostic scan to find it and repair it? I did an Avast full system scan, before Win7 start-up, but didn't locate the problem.